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Semtech Corporation RCLAMP2451ZATNT
- Part No.:
- RCLAMP2451ZATNT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0201 (0603 Metric)
- Datasheet:
-
RCLAMP2451ZATNT.pdf
- Description:
- 1-LINE 24V 0.45PF SLP0603P2X3F
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
RClamp2451ZATNT from Semtech is a bidirectional ultra-low-capacitance TVS diode designed for ESD protection of single-line 24V NFC, RF, and FM antenna circuits. It delivers ±14kV contact / ±18kV air ESD immunity per IEC 61000-4-2, 0.35pF typical junction capacitance at 0V, 0.16Ω typical dynamic resistance, and clamps to ≤7V at 4A (8/20µs).
For engineers reviewing the RClamp2451ZATNT datasheet, pinout, applications, or equivalent options, this device is selected specifically for high-fidelity RF signal line protection where minimal capacitive loading and low clamping voltage are critical to avoid harmonic distortion and signal clipping in resonant NFC circuits.
Technical Context
RClamp2451ZATNT employs silicon-avalanche solid-state technology optimized for transient suppression on AC-coupled RF paths. Its symmetrical bidirectional structure supports ±24V working voltage without DC bias dependency, enabling direct placement across NFC antenna differential pairs without rectification or polarity concerns.
The device operates with sub-nanosecond response time and is characterized using TLP (0.2/100ns) and combination-wave (1.2/50µs voltage + 8/20µs current) test methods. Clamping behavior is validated at 1A and 4A peak pulse currents, with dynamic resistance derived from 4A–16A TLP sweeps - confirming stable low-impedance conduction during multi-strike ESD events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | ±24V - matches NFC resonator circuit AC swing amplitude without signal clipping |
| Junction Capacitance | 0.35pF typical at VR = 0V, 1MHz - avoids harmonic distortion in 13.56MHz NFC and FM bands |
| Dynamic Resistance | 0.16Ω typical - ensures low clamping voltage (<7V at 4A) and robust protection for downstream Schottky diodes |
| ESD Withstand | ±14kV contact / ±18kV air per IEC 61000-4-2 - exceeds Level 4 industrial requirements |
| Clamping Voltage | 7V max at IPP = 4A (8/20µs) - limits voltage stress on NFC controller I/O pins during surge |
| Leakage Current | <50nA at 24V - prevents DC loading or bias shift in high-impedance antenna matching networks |
| Package Size | DFN 0.60 × 0.30 × 0.25 mm - enables placement directly at antenna feed point with minimal parasitic inductance |
Pinout & Package
Package: DFN 0.60 × 0.30 × 0.25 mm, 2-lead, bottom-view, electrically symmetrical, RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode/Cathode (symmetrical) | Electrically identical to Pin 2; bidirectional conduction path - no polarity assignment required in layout |
| Pin 2 | Anode/Cathode (symmetrical) | Interchangeable with Pin 1; enables placement across differential NFC antenna lines without orientation constraints |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low capacitance | 0.35pF typical - preserves signal integrity on 13.56MHz NFC and FM antenna traces |
| Bidirectional ESD protection | ±24V working voltage - supports AC-coupled resonant circuits without DC blocking components |
| High ESD endurance | ≥1000 strikes at IEC 61000-4-2 Level 4 - ensures long-term reliability in user-accessible interfaces |
| Low dynamic resistance | 0.16Ω typical - minimizes clamping overshoot and protects sensitive NFC controller front-end diodes |
| Miniature DFN package | 0.60 × 0.30 mm footprint - allows placement within <1mm of antenna feed point to reduce loop inductance |
Applications
| NFC Antenna Protection | FM Antenna Interface |
|---|---|
|
Use Scenario: Protecting bidirectional 13.56MHz NFC antenna traces between antenna coil and controller IC in smartphones and wearables. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across differential antenna feed points to shunt ESD transients before reaching NFC controller I/O. Use Value: 0.35pF capacitance prevents detuning of 13.56MHz resonance; ±24V rating avoids clipping of AC-coupled antenna signal swing. |
Use Scenario: ESD protection of FM radio antenna input lines in portable media players and automotive infotainment systems. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on unbalanced FM antenna trace to ground, preserving RF bandwidth up to 108MHz. Use Value: Sub-0.4pF capacitance ensures minimal insertion loss (<0.5dB at 100MHz); 0.16Ω RDYN maintains fast transient response without ringing. |
| RF Signal Line Protection | Portable Device Antenna Matching |
|
Use Scenario: Guarding high-speed RF signal paths in Bluetooth/Wi-Fi front-end modules exposed to handling ESD. IC Role / Device Role / Timing Role: Series-connected or shunt-mounted ESD suppressor on RF transceiver antenna switch output lines. Use Value: 7V clamping at 4A limits voltage stress on GaAs pHEMT switches; symmetrical structure eliminates polarity routing constraints. |
Use Scenario: Integration into compact NFC antenna matching networks where PCB space and parasitic effects are tightly constrained. IC Role / Device Role / Timing Role: Integrated ESD protection element co-located with Pi-network matching components on flexible antenna substrates. Use Value: 0.60 × 0.30 mm DFN footprint fits within 1.0 mm² matching network area; low leakage (<50nA) avoids Q-factor degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SP1002-01UTG | 0.25pF capacitance, 12V working voltage, ±12kV contact ESD rating | Limited to lower-voltage RF lines (e.g., GPS, BT), not suitable for ±24V NFC resonators | Select when protecting sub-15V RF paths where ultra-low capacitance outweighs voltage rating |
| ESD56201D05 | 0.5pF capacitance, 5.5V working voltage, ±30kV air ESD rating | Designed for USB/USB-C data lines; incompatible with 24V AC NFC operation due to low VRWM | Prefer for high-speed digital interfaces requiring extreme ESD margin but not RF transparency |
Compared with SP1002-01UTG and ESD56201D05, RClamp2451ZATNT uniquely balances ±24V working voltage, 0.35pF capacitance, and 0.16Ω dynamic resistance - making it the only qualified option for NFC antenna protection where signal fidelity and resonant voltage swing must both be preserved.
Availability
RClamp2451ZATNT is available at Aetrix Electronics and suitable for NFC antenna protection, FM radio interface design, and portable RF signal line hardening requiring stable component supply, consistent DFN 0.60×0.30mm packaging, and guaranteed ESD performance compliance to IEC 61000-4-2 Level 4.
Supply support for RClamp2451ZATNT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Semtech Corporation is a U.S.-based fabless semiconductor company specializing in analog and mixed-signal ICs for precision sensing, protection, and connectivity applications.
RClamp2451ZATNT belongs to Semtech's RailClamp® TVS diode family, engineered specifically for board-level ESD protection of high-frequency, high-impedance RF interfaces - with emphasis on NFC, FM, and wireless communication subsystems in space-constrained portable electronics.
FAQ
What is the maximum continuous working voltage for RClamp2451ZATNT?
RClamp2451ZATNT has a reverse stand-off voltage (VRWM) of 24V, meaning it can continuously withstand ±24V AC or DC signals without conduction. This rating is confirmed per the datasheet's Electrical Characteristics table under VRWM = 24V at Pin 1 to Pin 2, making RClamp2451ZATNT suitable for NFC resonator circuits operating with peak-to-peak swings up to 48V.
Does RClamp2451ZATNT require orientation during PCB placement?
No - RClamp2451ZATNT is electrically symmetrical, with identical anode/cathode behavior on both pins. The datasheet explicitly states "Device is electrically symmetrical" and shows no polarity marking on the schematic or pin configuration diagram. This allows zero-orientation placement across differential NFC antenna lines, simplifying layout and reducing assembly error risk.
What is the clamping voltage of RClamp2451ZATNT under a 4A ESD surge?
Per the Absolute Maximum Ratings and Electrical Characteristics tables, RClamp2451ZATNT clamps to a maximum of 8V at IPP = 4A using an 8/20µs current waveform with RS = 12Ω. At 1A, clamping is ≤7V. These values are measured after snapback conduction and define the peak voltage imposed on protected circuitry during standardized surge events.
Can RClamp2451ZATNT be used on a 5V USB data line?
RClamp2451ZATNT is not recommended for 5V USB data lines because its 24V working voltage is excessively high for that application - resulting in delayed turn-on and elevated clamping voltage relative to lower-VRWM alternatives like ESD56201D05. Its 0.35pF capacitance is ideal for RF, but over-spec'd voltage rating reduces protection responsiveness on low-voltage digital lines.
What is the thermal limit for RClamp2451ZATNT during reflow soldering?
RClamp2451ZATNT follows JEDEC J-STD-020 moisture sensitivity and reflow profile guidelines. The datasheet specifies "Solder Reflow Profile: Per JEDEC J-STD-020" in Table 1, confirming compatibility with standard lead-free reflow cycles peaking at 260°C. Its DFN package is rated for MSL 1, requiring no dry-bake prior to assembly.
RCLAMP2451ZATNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0201 (0603 Metric)
- Series:
- RailClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 24V (Max)
- Voltage - Breakdown (Min):
- 25.5V
- Voltage - Clamping (Max) @ Ipp:
- 8V
- Current - Peak Pulse (10/1000µs):
- 4A (8/20µs)
- Power - Peak Pulse:
- 32W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- 0.35pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP0603P2X3F
RCLAMP2451ZATNT FAQ
1.How can I place an order for RCLAMP2451ZATNT through Aetrix?
Please submit a Request for Quotation (RFQ) for RCLAMP2451ZATNT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for RCLAMP2451ZATNT reliable?
The price and inventory of RCLAMP2451ZATNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCLAMP2451ZATNT is usually 5 days.
3.What payment methods are accepted for RCLAMP2451ZATNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCLAMP2451ZATNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCLAMP2451ZATNT?
RCLAMP2451ZATNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCLAMP2451ZATNT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for RCLAMP2451ZATNT?
For technical support, including RCLAMP2451ZATNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCLAMP2451ZATNT requirements.
6.How does Aetrix verify that RCLAMP2451ZATNT is sourced from the original manufacturer or authorized distributors?
All RCLAMP2451ZATNT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that RCLAMP2451ZATNT meets industry standards.
7.What is the process for return or replacement of RCLAMP2451ZATNT?
All RCLAMP2451ZATNT units undergo pre-shipment inspection (PSI). If there is an issue with RCLAMP2451ZATNT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The RCLAMP2451ZATNT part is unused and in its original packaging.
Return procedure for RCLAMP2451ZATNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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